For his exhibition “Rock the Void,” Josef Dabernig—a Conceptual artist and filmmaker with a master’s degree from the Academy of Fine Arts in Vienna—cleaned out and tidied up MUMOK’s spaces. His display negotiated between the format of the museum and that of the movie theater—in other words, the white cube and the black box—in an exhibition architecture extending across two floors, an arrangement of staggered cubes placed before empty walls, their edges aligned with crisscrossing oblique visual axes, and lined with twenty-one sparsely stocked glass cases and a half a dozen